Abstract
The Raman spectrum of methane in solid matrices is reported. The ν1 and ν3 modes were observed in argon, krypton, xenon, and nitrogen matrices, and the effect of temperature and concentration changes investigated. The ν2 transition was recorded in Ar, Kr, and Xe solids. For CD4 the ν1, ν2, 2ν2, and ν3 bands were measured in xenon matrices. The rotational band structure observed in the ν3 and ν2 modes is related to a theoretical model for matrix isolated methane, existing for ν3 and applied by us to ν2 also, and to the free molecular transitions. Our results are compared to previously published Raman spectra and differences and discrepancies are pointed out.
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